Characterization tests of an Apitron particulate control device. Final report. [Includes electrostatic augmentation]
A 2400-acfm pilot-scale Apitron electrostatically augmented fabric filter was evaluated on a slip-stream of a pulverized-coal-fired boiler at the EPRI Arapahoe Test Facility in Denver, Colorado. Tests made over a range of operating conditions included determination of the dependence of collection efficiency and operating pressure drop on the air-to-cloth ratio, the level of electrostatic augmentation, and the type of filter fabric (woven glass fiber, felted Nomex, and felted Teflon). The test methods used were state-of-the-art techniques for measuring particle-collection efficiencies using inertial, optical, and electrical mobility measurements. The electrical resistivity of the fly ash and the electrostatic charge of individual particles of the fly ash were also measured. Particle collection efficiencies obtained with the Apitron were comparable to those of conventional fabric filters although the operating conditions were substantially different. High collection efficiencies (>99.9%) are common in conventional units; but for reverse-gas cleaning the air-to-cloth ratios are generally less than 2 acfm/ft/sup 2/. System pressure drops range from 3 to 10 in. w.c. In operating the Apitron with woven glass bags similar to those commonly used by conventional systems, collection efficiencies greater than 99% were obtained for air-to-cloth ratios of 4.5 to 9.1 acfm/ft/sup 2/. At an air-to-cloth ratio of 4.5 acfm/ft/sup 2/, the Apitron system pressure drop was in the range of 2 to 4 in. w.c. with electrostatic augmentation and 5 to 8 in. w.c. without electrostatic augmentation. Although the unit sometimes operated in back corona, the effects of electrostatic augmentation were beneficial more often than not. Operating pressure drops of the system were considerably reduced for all filter materials tested when the charger power was on.
- Research Organization:
- Southern Research Inst., Birmingham, AL (USA)
- OSTI ID:
- 6238931
- Report Number(s):
- EPRI-CS-3713; ON: TI85920059
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electrostatic enhancement of fabric filter performance
Applying fabric filtration to coal fired industrial boilers. A pilot scale investigation. Final report, Jun 1974--Apr 1975
Related Subjects
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AEROSOL WASTES
ASHES
DATA
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROSTATIC PRECIPITATORS
ELECTROSTATICS
EQUIPMENT
EXPERIMENTAL DATA
FABRIC FILTERS
FILTERS
FILTRATION
FLUE GAS
FLUORINATED ALIPHATIC HYDROCARBONS
FLY ASH
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
GLASS
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
PERFORMANCE TESTING
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLLUTION CONTROL EQUIPMENT
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
POWER PLANTS
PRESSURE DROP
RESIDUES
SEPARATION PROCESSES
SYNTHETIC MATERIALS
TEFLON
TESTING
THERMAL POWER PLANTS
WASTES